PM 2.5

Early this month, I was in the Delhi High Court, where a battery of lawyers had filed separate petitions against the odd-even scheme of the Delhi government. This is a scheme to ration car usage so that in the critically polluted winter months only half the vehicles are on the road. Their arguments were that the scheme had led to enormous inconvenience and worse, daily pollution data showed no impact on air quality. Cars, they said, were not responsible for pollution.

THE EASIEST way to clear air pollution is to not know how bad it is. This is what India practices—in most parts of the country. There is virtually no equipment to monitor the air we breathe and no system that tells us what we should do when pollution levels are up and unhealthy.

Just consider. Every time petrol prices are raised, oil companies end up losing more money. Simply because the price differential between petrol and diesel increases further, and people gravitate towards diesel vehicles. More the use of diesel, more the oil companies bleed. Worse, we all bleed because diesel vehicles add to toxic pollution in our cities, which, in turn, adds to ill health and treatment costs.